After installing the latest extension updates, saving a topic (new or existing) ended in two errors: The full error message from the log can be read below.

Apparently, two updated extensions required the Time/ParseDate CPAN module, the DBCacheContrib and the DBCachePlugin extionsions. The extensions have a log of their own: .../working/logs/configure/PluginName-InstallDate-Version?-Install.log

After adding the Time::ParseDate module to the foswiki/lib/CPAN/lib directory, the problem was solved.

.../working/logs/configure/DBCachePlugin-20180529-102512-Install.log

Installing DBCachePlugin

> Loading package installer

Dependency Report for DBCachePlugin

> *INSTALLED* > WARNING: *MISSING*

Creating backup of DBCachePlugin

> Running pre-install for DBCachePlugin ...

Installing DBCachePlugin

> Unpacking /tmp/wG1jfU2j3F.tgz…, Size: 32258 Modified: Tue May 29 12:25:12 2018
> Saving /tmp/wG1jfU2j3F.tgz to /home/boossybe/domains/boossy.be/public_html/wiki/working/configure/download/DBCachePlugin.tgz
> Installed: 7 files copied; 0 filed checked in, 0 files attached
> Installed: DBCachePlugin _installer to /home/boossybe/domains/boossy.be/public_html/wiki/working/configure/pkgdata
> Running post-install for DBCachePlugin...
> Before proceeding, review the dependency reports of each installed extension
and resolve any dependencies, as required.

> After your configuration has been saved:

> WARNING: CPAN dependencies were detected, but will not be automatically
installed by the Web installer. The following dependencies should be manually resolved as required.

> The following configuration changes are needed to enable plugins.
These will be automatically applied when the configuration is saved.

> Changed: {Plugins}{DBCachePlugin}{Enabled} = 1
> Changed: {Plugins}{DBCachePlugin}{Module} = 'Foswiki::Plugins::DBCachePlugin'

> WARNING:
> Installation finished

.../working/logs/configure/DBCacheContrib-20180529-102512-Install.log

Installing DBCacheContrib

> Loading package installer

Dependency Report for DBCacheContrib

> *INSTALLED* > WARNING: *MISSING*

Creating backup of DBCacheContrib

> Running pre-install for DBCacheContrib ...

Installing DBCacheContrib

> Unpacking /tmp/0UbXaSpCDE.tgz…, Size: 42427 Modified: Tue May 29 12:25:12 2018
> Saving /tmp/0UbXaSpCDE.tgz to /home/boossybe/domains/boossy.be/public_html/wiki/working/configure/download/DBCacheContrib.tgz
> Installed: 29 files copied; 0 filed checked in, 0 files attached
> Installed: DBCacheContrib _installer to /home/boossybe/domains/boossy.be/public_html/wiki/working/configure/pkgdata
> Running post-install for DBCacheContrib...
> Before proceeding, review the dependency reports of each installed extension
and resolve any dependencies, as required.

> After your configuration has been saved:

> WARNING: CPAN dependencies were detected, but will not be automatically
installed by the Web installer. The following dependencies should be manually resolved as required.

> The following configuration changes are needed to enable plugins.
These will be automatically applied when the configuration is saved.

> WARNING:
> Installation finished

.../working/logs/error.log

| 2018-06-02T14:19:00+02:00 error | Can't locate Time/ParseDate.pm in @INC (@INC contains: /home/boossybe/domains/boossy.be/public_html/wiki/lib /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 . /home/boossybe/domains/boossy.be/public_html/wiki/lib/CPAN/lib) at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 36.
 at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 36
 Foswiki::Contrib::DBCacheContrib::Search::BEGIN() called at Time/ParseDate.pm line 36
 eval {...} called at Time/ParseDate.pm line 36
 require Foswiki/Contrib/DBCacheContrib/Search.pm called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin/Core.pm line 28
 Foswiki::Plugins::DBCachePlugin::Core::BEGIN() called at Time/ParseDate.pm line 36
 eval {...} called at Time/ParseDate.pm line 36
 require Foswiki/Plugins/DBCachePlugin/Core.pm called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 117
 Foswiki::Plugins::DBCachePlugin::getCore() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 195
 Foswiki::Plugins::DBCachePlugin::afterSaveHandler('%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugin.pm line 311
 Foswiki::Plugin::invoke('Foswiki::Plugin=HASH(0x334beb0)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins.pm line 376
 Foswiki::Plugins::dispatch('Foswiki::Plugins=HASH(0x31daa80)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Meta.pm line 2015
 Foswiki::Meta::save('Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 687
 Foswiki::UI::Save::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x4326b40)', 'HASH(0x469e200)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 705
 Foswiki::UI::Save::save('Foswiki=HASH(0x31da810)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 374
 Foswiki::UI::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x23112e0)', 'HASH(0x3226238)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 500
 Foswiki::UI::_execute('Foswiki::Request=HASH(0x319f250)', 'CODE(0x31fb1e0)', 'save', 1) called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 326
 Foswiki::UI::handleRequest('Foswiki::Request=HASH(0x319f250)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Engine/CGI.pm line 100
 Foswiki::Engine::CGI::run('Foswiki::Engine::CGI=HASH(0x2b224e0)') called at /home/boossybe/domains/boossy.be/public_html/wiki/bin/save line 31
BEGIN failed--compilation aborted at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 36.
 at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 36
 require Foswiki/Contrib/DBCacheContrib/Search.pm called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin/Core.pm line 28
 Foswiki::Plugins::DBCachePlugin::Core::BEGIN() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 36
 eval {...} called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 36
 require Foswiki/Plugins/DBCachePlugin/Core.pm called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 117
 Foswiki::Plugins::DBCachePlugin::getCore() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 195
 Foswiki::Plugins::DBCachePlugin::afterSaveHandler('%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugin.pm line 311
 Foswiki::Plugin::invoke('Foswiki::Plugin=HASH(0x334beb0)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins.pm line 376
 Foswiki::Plugins::dispatch('Foswiki::Plugins=HASH(0x31daa80)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Meta.pm line 2015
 Foswiki::Meta::save('Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 687
 Foswiki::UI::Save::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x4326b40)', 'HASH(0x469e200)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 705
 Foswiki::UI::Save::save('Foswiki=HASH(0x31da810)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 374
 Foswiki::UI::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x23112e0)', 'HASH(0x3226238)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 500
 Foswiki::UI::_execute('Foswiki::Request=HASH(0x319f250)', 'CODE(0x31fb1e0)', 'save', 1) called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 326
 Foswiki::UI::handleRequest('Foswiki::Request=HASH(0x319f250)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Engine/CGI.pm line 100
 Foswiki::Engine::CGI::run('Foswiki::Engine::CGI=HASH(0x2b224e0)') called at /home/boossybe/domains/boossy.be/public_html/wiki/bin/save line 31
Compilation failed in require at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin/Core.pm line 28.
 at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin/Core.pm line 28
 Foswiki::Plugins::DBCachePlugin::Core::BEGIN() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 28
 eval {...} called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Contrib/DBCacheContrib/Search.pm line 28
 require Foswiki/Plugins/DBCachePlugin/Core.pm called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 117
 Foswiki::Plugins::DBCachePlugin::getCore() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 195
 Foswiki::Plugins::DBCachePlugin::afterSaveHandler('%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugin.pm line 311
 Foswiki::Plugin::invoke('Foswiki::Plugin=HASH(0x334beb0)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins.pm line 376
 Foswiki::Plugins::dispatch('Foswiki::Plugins=HASH(0x31daa80)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Meta.pm line 2015
 Foswiki::Meta::save('Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 687
 Foswiki::UI::Save::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x4326b40)', 'HASH(0x469e200)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 705
 Foswiki::UI::Save::save('Foswiki=HASH(0x31da810)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 374
 Foswiki::UI::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x23112e0)', 'HASH(0x3226238)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 500
 Foswiki::UI::_execute('Foswiki::Request=HASH(0x319f250)', 'CODE(0x31fb1e0)', 'save', 1) called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 326
 Foswiki::UI::handleRequest('Foswiki::Request=HASH(0x319f250)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Engine/CGI.pm line 100
 Foswiki::Engine::CGI::run('Foswiki::Engine::CGI=HASH(0x2b224e0)') called at /home/boossybe/domains/boossy.be/public_html/wiki/bin/save line 31
BEGIN failed--compilation aborted at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin/Core.pm line 28.
 at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin/Core.pm line 28
 require Foswiki/Plugins/DBCachePlugin/Core.pm called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 117
 Foswiki::Plugins::DBCachePlugin::getCore() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 195
 Foswiki::Plugins::DBCachePlugin::afterSaveHandler('%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugin.pm line 311
 Foswiki::Plugin::invoke('Foswiki::Plugin=HASH(0x334beb0)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins.pm line 376
 Foswiki::Plugins::dispatch('Foswiki::Plugins=HASH(0x31daa80)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Meta.pm line 2015
 Foswiki::Meta::save('Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 687
 Foswiki::UI::Save::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x4326b40)', 'HASH(0x469e200)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 705
 Foswiki::UI::Save::save('Foswiki=HASH(0x31da810)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 374
 Foswiki::UI::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x23112e0)', 'HASH(0x3226238)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 500
 Foswiki::UI::_execute('Foswiki::Request=HASH(0x319f250)', 'CODE(0x31fb1e0)', 'save', 1) called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 326
 Foswiki::UI::handleRequest('Foswiki::Request=HASH(0x319f250)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Engine/CGI.pm line 100
 Foswiki::Engine::CGI::run('Foswiki::Engine::CGI=HASH(0x2b224e0)') called at /home/boossybe/domains/boossy.be/public_html/wiki/bin/save line 31
Compilation failed in require at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 117.
 at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 117
 Foswiki::Plugins::DBCachePlugin::getCore() called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins/DBCachePlugin.pm line 195
 Foswiki::Plugins::DBCachePlugin::afterSaveHandler('%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugin.pm line 311
 Foswiki::Plugin::invoke('Foswiki::Plugin=HASH(0x334beb0)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Plugins.pm line 376
 Foswiki::Plugins::dispatch('Foswiki::Plugins=HASH(0x31daa80)', 'afterSaveHandler', '%META:TOPICINFO{author="StijnBousard" comment="reprev" date="...', '1_Boossy', 'Boossy', undef, 'Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Meta.pm line 2015
 Foswiki::Meta::save('Foswiki::Meta=HASH(0x4176e40)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 687
 Foswiki::UI::Save::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x4326b40)', 'HASH(0x469e200)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI/Save.pm line 705
 Foswiki::UI::Save::save('Foswiki=HASH(0x31da810)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 374
 Foswiki::UI::__ANON__() called at /usr/local/share/perl5/Error.pm line 415
 eval {...} called at /usr/local/share/perl5/Error.pm line 407
 Error::subs::try('CODE(0x23112e0)', 'HASH(0x3226238)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 500
 Foswiki::UI::_execute('Foswiki::Request=HASH(0x319f250)', 'CODE(0x31fb1e0)', 'save', 1) called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/UI.pm line 326
 Foswiki::UI::handleRequest('Foswiki::Request=HASH(0x319f250)') called at /home/boossybe/domains/boossy.be/public_html/wiki/lib/Foswiki/Engine/CGI.pm line 100
 Foswiki::Engine::CGI::run('Foswiki::Engine::CGI=HASH(0x2b224e0)') called |